CN107774891A - A kind of coating for improving spheroidal graphite casting mechanical property - Google Patents
A kind of coating for improving spheroidal graphite casting mechanical property Download PDFInfo
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- CN107774891A CN107774891A CN201710802731.1A CN201710802731A CN107774891A CN 107774891 A CN107774891 A CN 107774891A CN 201710802731 A CN201710802731 A CN 201710802731A CN 107774891 A CN107774891 A CN 107774891A
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- coating
- parts
- suspending agent
- casting
- mechanical property
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The present invention relates to ball milling casting technology field,Disclose a kind of coating for improving spheroidal graphite casting mechanical property,Do not reacted when high-temperature liquid metal is poured into a mould through compound caused by chemical reaction with coating surface,Possess certain mechanical strength and be firmly attached on ball milling mold material,And formed continuous,Uniform coating,The refractory powder used not only has high fire resistance,Can also significantly increase the content of pearlite in alloy on metal casting surface,Shrinkage cavity will not be produced,Shrinkage porosite,Decaying spheroidisation,The casting flaw such as graphite floatation and graphite deformity,Coating each component mixes highly uniform,Aggregate can be well soluble in and be dispersed among medium,The high-temperature resistant property of coating reaches I grade,The casting flaw rate of casting is reduced to 0.01%,The casting more existing production technology of mechanical property has and significantly improved,Especially tensile strength and elongation.
Description
Technical field
The invention belongs to ball milling casting technology field, and in particular to a kind of coating for improving spheroidal graphite casting mechanical property.
Background technology
Cast paint is that stop buffer action is played among casting and casting mold, reaches Sand sticking-resistant purpose, is gravity-type metal
The basic coating of casting, suitable for all metal dies.Cast paint particle is relatively thick, but heat-insulating property is good, can prevent from casting
Casting misrun and cold shut when making.Suitable for thin thin section casting and Large Plane, inlet, wheel hub, piston, company are also applied for
Bar, cylinder etc..Generally, the painting hanging method of cast paint several, the wherein dip-coating that there is brush, leaching, leaching, spray or leaching to be combined
Method have production efficiency is high, save coating, coating uniform and to coating it is less demanding, easy to operate, do not need special set
It is the advantages that standby, well received in actual applications.
Although having carried out a series of research to spheroidal graphite foundry facing, actual production is not applied to really
In, its operability is not high, expensive, therefore does not cause the enough attention of part producing enterprise, the performance of cast paint
Remain in more basic level.
The content of the invention
The purpose of the present invention is to be directed to the problem of existing, there is provided a kind of coating for improving spheroidal graphite casting mechanical property, tool
Standby certain mechanical strength and be firmly attached on ball milling mold material, and form continuous, uniform coating, casting mechanical property compared with
Existing production technology has and significantly improved, especially tensile strength and elongation.
The present invention is achieved by the following technical solutions：
A kind of coating for improving spheroidal graphite casting mechanical property, is made up of following component in parts by weight：Refractory powder 65-70
Part, mix suspending agent 1.5-2.0 parts, phenolic resin 1.0-1.2 parts, silester 0.5-0.7 parts, ethanol 15-20 parts, carboxymethyl
Sodium cellulosate 0.4-0.6 parts, ethyl cellulose 0.3-0.5 parts；
Its preparation method is：Mix suspending agent is added in reactor, 50-60 DEG C, stirring 20-30 minutes is heated to, adds
Refractory powder and ethanol solution, are to slowly warm up to 75-78 DEG C, by phenolic resin, silester, sodium carboxymethylcellulose, ethyl
Cellulose dissolution is homogenized, and is added in reactor, is kept for reaction 50-60 minutes, is cooled to 40-50 DEG C, is ground homogenizing, stirs
After mixing uniformly, discharged when temperature reaches 30-35 DEG C, packaging.
As further improvement of these options, the refractory powder contains following component according to mass percent meter：
Silica accounts for 30-35%, aluminum oxide accounts for 25-30%, calcium oxide accounts for 10-15%, iron oxide accounts for 5-6%, magnesia accounts for 3-3.5%, oxidation
Titanium accounts for 2.5-3.0%, sodium oxide molybdena accounts for 1.5-2.0%, remaining as potassium oxide.
As further improvement of these options, the mix suspending agent contains following component：It is lithium base suspending agent, organic
Suspending agent, polyvinyl butyral resin, quality proportioning 4-5:6-8:1-2.
As further improvement of these options, the preparation method of the lithium base suspending agent is：Lithium bentonite is used
The pure water of 2-2.5 times of volume is swelled, and is added volume fraction and is mixed for 65-70% alcohol, stands 10-12 hours
Afterwards, colloid is obtained, colloid is ground, 40-48 hours are aged after grinding, produce lithium base suspending agent.
The present invention has advantages below compared with prior art：It is comprehensive in order to solve coating property in existing spheroidal graphite casting
The problem of bad, the invention provides a kind of coating for improving spheroidal graphite casting mechanical property, through chemistry when high-temperature liquid metal is poured into a mould
Compound caused by reaction is not reacted with coating surface, is possessed certain mechanical strength and is firmly attached on ball milling mold material,
And continuous, uniform coating is formed, the refractory powder used not only has high fire resistance, can also make metal casting surface
Content of pearlite in alloy significantly increase, the castings such as shrinkage cavity and porosity, decaying spheroidisation, graphite floatation and graphite deformity will not be produced and lacked
Fall into, coating each component mixes highly uniform, and aggregate can be well soluble in and be dispersed among medium, and the high temperature of coating resists
Fragility reaches I grade, and the casting flaw rate of casting is reduced to 0.01%, and the casting more existing production technology of mechanical property has very great Cheng
The improvement of degree, especially tensile strength and elongation.
Embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1
A kind of coating for improving spheroidal graphite casting mechanical property, is made up of following component in parts by weight：65 parts of refractory powder, mix
It is fine to close 1.5 parts of suspending agent, 1.0 parts of phenolic resin, 0.5 part of silester, 15 parts of ethanol, 0.4 part of sodium carboxymethylcellulose, ethyl
0.3 part of dimension element；
Its preparation method is：Mix suspending agent is added in reactor, 50 DEG C is heated to, stirs 20 minutes, add refractory powder
Material and ethanol solution, are to slowly warm up to 75 DEG C, and phenolic resin, silester, sodium carboxymethylcellulose, ethyl cellulose are dissolved
Homogenizing, is added in reactor, keeps reaction 500 minutes, is cooled to 40 DEG C, is ground homogenizing, after stirring, in temperature
Discharged when reaching 30 DEG C, packaging.
As further improvement of these options, the refractory powder contains following component according to mass percent meter：
Silica account for 30%, aluminum oxide account for 25%, calcium oxide account for 10%, iron oxide account for 5%, magnesia account for 3%, titanium oxide account for 2.50%, oxidation
Sodium accounts for 1.5%, remaining as potassium oxide.
As further improvement of these options, the mix suspending agent contains following component：It is lithium base suspending agent, organic
Suspending agent, polyvinyl butyral resin, quality proportioning 4:6:1.
As further improvement of these options, the preparation method of the lithium base suspending agent is：By lithium bentonite with 2
The pure water of times volume is swelled, and is added volume fraction and is mixed for 65% alcohol, after standing 10 hours, obtains colloid,
Colloid is ground, is aged 40 hours after grinding, produces lithium base suspending agent.
Embodiment 2
A kind of coating for improving spheroidal graphite casting mechanical property, is made up of following component in parts by weight：68 parts of refractory powder, mix
It is fine to close 1.8 parts of suspending agent, 1.1 parts of phenolic resin, 0.6 part of silester, 18 parts of ethanol, 0.5 part of sodium carboxymethylcellulose, ethyl
0.4 part of dimension element；
Its preparation method is：Mix suspending agent is added in reactor, 55 DEG C is heated to, stirs 25 minutes, add refractory powder
Material and ethanol solution, are to slowly warm up to 76 DEG C, and phenolic resin, silester, sodium carboxymethylcellulose, ethyl cellulose are dissolved
Homogenizing, is added in reactor, keeps reaction 55 minutes, is cooled to 45 DEG C, is ground homogenizing, after stirring, in temperature
Discharged when reaching 32 DEG C, packaging.
As further improvement of these options, the refractory powder contains following component according to mass percent meter：
Silica, which accounts for 33%, aluminum oxide and accounts for 28%, calcium oxide and account for 12%, iron oxide and account for 5.5%, magnesia and account for 3.3%, titanium oxide, accounts for 2.8%, oxygen
Change sodium and account for 1.8%, remaining as potassium oxide.
As further improvement of these options, the mix suspending agent contains following component：It is lithium base suspending agent, organic
Suspending agent, polyvinyl butyral resin, quality proportioning 4.5:7:1.5.
As further improvement of these options, the preparation method of the lithium base suspending agent is：Lithium bentonite is used
The pure water of 2.2 times of volumes is swelled, and is added volume fraction and is mixed for 68% alcohol, after standing 11 hours, obtains glue
Body, colloid is ground, is aged 44 hours after grinding, produces lithium base suspending agent.
Embodiment 3
A kind of coating for improving spheroidal graphite casting mechanical property, is made up of following component in parts by weight：70 parts of refractory powder, mix
It is fine to close 2.0 parts of suspending agent, 1.2 parts of phenolic resin, 0.7 part of silester, 20 parts of ethanol, 0.6 part of sodium carboxymethylcellulose, ethyl
0.5 part of dimension element；
Its preparation method is：Mix suspending agent is added in reactor, 60 DEG C is heated to, stirs 30 minutes, add refractory powder
Material and ethanol solution, are to slowly warm up to 78 DEG C, and phenolic resin, silester, sodium carboxymethylcellulose, ethyl cellulose are dissolved
Homogenizing, is added in reactor, keeps reaction 60 minutes, is cooled to 50 DEG C, is ground homogenizing, after stirring, in temperature
Discharged when reaching 35 DEG C, packaging.
As further improvement of these options, the refractory powder contains following component according to mass percent meter：
Silica account for 35%, aluminum oxide account for 30%, calcium oxide account for 15%, iron oxide account for 6%, magnesia account for 3.5%, titanium oxide account for 3.0%, oxidation
Sodium accounts for 2.0%, remaining as potassium oxide.
As further improvement of these options, the mix suspending agent contains following component：It is lithium base suspending agent, organic
Suspending agent, polyvinyl butyral resin, quality proportioning 5:8:2.
As further improvement of these options, the preparation method of the lithium base suspending agent is：Lithium bentonite is used
The pure water of 2.5 times of volumes is swelled, and is added volume fraction and is mixed for 70% alcohol, after standing 12 hours, obtains glue
Body, colloid is ground, is aged 48 hours after grinding, produces lithium base suspending agent.
Comparative example 1-4
Compared with embodiment, comparative example adjusts in coating composition content, and specific as shown in table 1, remaining holding is constant.
Parts by weight shared by coating each component in the comparative example 1-4 of table 1
Contrast experiment
Spheroidal graphite cast paint is prepared using embodiment 1-3 and comparative example 1-4 method respectively, while is cast and applied with existing spheroidal graphite
Material is compared, and is applied in the processing of identical cast member, performance result is recorded as shown in table 2.
The each group cast paint application performance of table 2
The coating each component mixing of the invention being prepared is highly uniform as can be seen here, and aggregate can be well soluble in and uniformly divide
It is dispersed among medium, the high-temperature resistant property of coating reaches I grade, and the casting flaw rate of casting is reduced to 0.01%, casts mechanical property
More existing production technology has and significantly improved, especially tensile strength and elongation.
Claims (4)
1. a kind of coating for improving spheroidal graphite casting mechanical property, it is characterised in that be made up in parts by weight of following component：It is resistance to
Fiery powder 65-70 parts, mix suspending agent 1.5-2.0 parts, phenolic resin 1.0-1.2 parts, silester 0.5-0.7 parts, ethanol 15-
20 parts, sodium carboxymethylcellulose 0.4-0.6 parts, ethyl cellulose 0.3-0.5 parts；
Its preparation method is：Mix suspending agent is added in reactor, 50-60 DEG C, stirring 20-30 minutes is heated to, adds
Refractory powder and ethanol solution, are to slowly warm up to 75-78 DEG C, by phenolic resin, silester, sodium carboxymethylcellulose, ethyl
Cellulose dissolution is homogenized, and is added in reactor, is kept for reaction 50-60 minutes, is cooled to 40-50 DEG C, is ground homogenizing, stirs
After mixing uniformly, discharged when temperature reaches 30-35 DEG C, packaging.
2. a kind of coating for improving spheroidal graphite casting mechanical property as claimed in claim 1, it is characterised in that the refractory powder is pressed
Contain following component according to mass percent meter：Silica accounts for 30-35%, aluminum oxide accounts for 25-30%, calcium oxide accounts for 10-15%, oxidation
Iron accounts for 5-6%, magnesia accounts for 3-3.5%, titanium oxide accounts for 2.5-3.0%, sodium oxide molybdena accounts for 1.5-2.0%, remaining as potassium oxide.
A kind of 3. coating for improving spheroidal graphite casting mechanical property as claimed in claim 1, it is characterised in that the mix suspending agent
Contain following component：Lithium base suspending agent, organic suspending agent, polyvinyl butyral resin, quality proportioning 4-5:6-8:1-2.
A kind of 4. coating for improving spheroidal graphite casting mechanical property as claimed in claim 3, it is characterised in that the lithium base suspending agent
Preparation method be：Lithium bentonite is swelled with the pure water of 2-2.5 times of volume, it is 65-70% to add volume fraction
Alcohol is mixed, and after standing 10-12 hours, obtains colloid, colloid is ground, and 40-48 hours are aged after grinding, are produced
Lithium base suspending agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802731.1A CN107774891A (en) | 2017-09-08 | 2017-09-08 | A kind of coating for improving spheroidal graphite casting mechanical property |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710802731.1A CN107774891A (en) | 2017-09-08 | 2017-09-08 | A kind of coating for improving spheroidal graphite casting mechanical property |
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| CN107774891A true CN107774891A (en) | 2018-03-09 |
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| CN201710802731.1A Pending CN107774891A (en) | 2017-09-08 | 2017-09-08 | A kind of coating for improving spheroidal graphite casting mechanical property |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101384384A (en) * | 2006-01-17 | 2009-03-11 | 阿什兰德-南方化学-中坚有限公司 | Water-based liquid size containing a seeding agent |
| CN103252445A (en) * | 2013-04-25 | 2013-08-21 | 吴江市液铸液压件铸造有限公司 | Coating for die cavity surface |
| CN104084527A (en) * | 2014-06-16 | 2014-10-08 | 芜湖市鸿坤汽车零部件有限公司 | Alcohol-based foundry coating compounded by chromite/ expanded vermiculite and producing method thereof |
| CN104889317A (en) * | 2015-06-24 | 2015-09-09 | 梁胜光 | Coating for casting sand molds |
| CN106180542A (en) * | 2016-08-17 | 2016-12-07 | 高红星 | Furan Resin-Bonded Sand wind-powered electricity generation G. Iron Castings surface anti-seepage sulfur coating |
-
2017
- 2017-09-08 CN CN201710802731.1A patent/CN107774891A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101384384A (en) * | 2006-01-17 | 2009-03-11 | 阿什兰德-南方化学-中坚有限公司 | Water-based liquid size containing a seeding agent |
| CN103252445A (en) * | 2013-04-25 | 2013-08-21 | 吴江市液铸液压件铸造有限公司 | Coating for die cavity surface |
| CN104084527A (en) * | 2014-06-16 | 2014-10-08 | 芜湖市鸿坤汽车零部件有限公司 | Alcohol-based foundry coating compounded by chromite/ expanded vermiculite and producing method thereof |
| CN104889317A (en) * | 2015-06-24 | 2015-09-09 | 梁胜光 | Coating for casting sand molds |
| CN106180542A (en) * | 2016-08-17 | 2016-12-07 | 高红星 | Furan Resin-Bonded Sand wind-powered electricity generation G. Iron Castings surface anti-seepage sulfur coating |
Non-Patent Citations (1)
| Title |
|---|
| 中国机械工程学会铸造分会: "《铸造手册（第4卷 造型材料）》", 31 May 2002, 机械工业出版社 * |
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Application publication date: 20180309 |